aNote that this was the final conclusion of the scientific investigators. An initial finding by the Armed Forces Institute of Pathology (AFIP) found, upon gross examination, that the spores exhibited a silicon signal and sometimes exhibited an oxygen signal. Subsequent studies conducted by Sandia National Laboratories (as described in Chapter 4 of this report) determined that the silicon was localized to the spore coat within the exosporium—that is, it was incorporated into the cell as a natural part of the cell formation process. The USAMRIID scientist who first reviewed the AFIP results and made statements regarding the presence of silicon and possible weaponization retracted those earlier statements.

bSee for example, “As noted above, based on advanced genetic testing combined with rigorous investigation, the FBI concluded that RMR-1029 is the parent material of the evidentiary anthrax spore powder, i.e., the evidentiary material came from a derivative growth of RMR-1029.” (p. 28) “As described in detail above, over time, genetic analysis determined that one of Dr. Ivins’s Ames cultures, RMR-1029—the purest and most concentrated batch of Ames spores known to exist—was the parent to the evidentiary material used in the anthrax mailings.” (p.79)



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